Bolt-cutting machine.



A. B. LANDIS.

BOLT CUTTING MACHINE.

APPmcArIo? FILED 0017. 1905.

Patented Feb.8,1910.

- 1 15? ivihltar v a. 4 r 7mm AD /1;?

fl UNITED s'iiyrns PATnnT OFFICE.

ABRAHAM B. LAIilDIS, OF WAYNESBORO, PENNSYLVANIA.

T o whom i2 may com-em: 3' Be it known that I, ABRAHAM B. LANDIS,

n'cr iizen of the United States. residing at li fzi rnesburo. in the couniy of Franklin and Hair of Pennsylvania, have invented certain he: and useful improvements in Bolt-Ciniing Machines, of which the following is 21 specification.

In cutting threads on bolts, screws, eta. some difficulty is ordinarily experienced in securing a smooth and true thread at the point of the bolt because of the irregula ity or variation in the force with which the blank is foil to the (lie at the beginning of E will hereinafter more fully il-as rrilmi and claimed;

iieierring to the accompanying drawings .ii are made a part hereof and on which siiniinr reference clnirnc ers lDllCiiiQ similar port Figure 1 is a side (lGViiilOl ruff. machine showing one central bearings and cutter-howl broken 3W2) in order to illustrate the improved mechanism more clearly, Fig. is a from elevation of the antler-head with the die closed in ih: pos 'ion it xxx-m les when in .pesui'ion. Fig. 3 a detail and elevation as s s-en when looking in tho ilir aclion imlii'zntoil by zhe .HTJ)\YS from flw ioiteil lino 3--3 in Fig. L'Fig'. el :1 detail sectional view s milar to a portion of Fig. 1 out on an enlarged smile. and Fig. 3 a similn r view showing the end of the follower.

In said drawings tho poriion innrhoil A rep-z ent the main frame or )0(l V oi tho machine, ll th holt'carnving and fi'iilllllgl C the C\'!ilQl-llClEl and i) ihe iol forzi' ii? PTUlCZPZEl sol; of my pro-sent inVr-nimu. The

BQLT- (PUTTING MACHIN E.

Speciflcafion of Letters Eatent.

Patented'l eb. 8, 19m.

ipgiicatior. filed October 7, 1905. Serial No. 281,814.

suitable pinion b engaging with a rack-bar A suitably mounted on the table A. It is provided with sliding jaws Z) adapted to receive. and hold {he bolt blank B as. shown and ilesi-ribeil in my application No. 281,812 pending herewith. The cuttenheud C is also of any approved construction and arrangement, but yrefcrably like that shown in my application ho. $1,813 pending herewith. h is provided with {L cum-ring G for operating the cutter-(lie having a shifting fork with inwardly projecting tongues c engaging with a. circumferential groove in said cum-ring. Said shifting fork L is provided with handles or arms 0 and by which it may be operated. The lower arm 0 is connected at its lower and by :1 pivot c with a rod A mounted to slide at 1 one end in :1 lug a on the side of the frame A and at, the other end in n perforation in the lower end of an arm b which depends from tho snle of the holi carriage B. The end of soul rod .3: wnlcu extends beyouo the log is provided with a collar (1 and u tulle-(L spring a is interposed between said collar a i and the lug a. 'lhe'oihor end 02 said rod A of a bolt .e of tho is snrozi'-ilircndcd and a nut a" is -1nonmcd thereon on the end projecting oulsidc of lhe :irni 7f. A short distance above the lower and of said arm 0 it is provided with a horizontallyextonding hitch-pin 0* with which a latch C is adopted to engage. fluid latch C is mounted on :2 pivm. 9" on the siileuf fl li1n8 ;'L and a downwardly projoi-ti ig :mu 0' which is connected by a pivot c with (ho and of a rod C The other end of rod U is muuniecl and adapted to slide through :1 perforation 'l'orincigl in the arm I; at. a. point just ziho'ccthe perforation through hich the rod A slii'ics. Said rod 0' screwthreni'lml and a nun a is mounted thereon in (suitor-(lie coinis niounloil or urrnugid on the cuiicr-ln-ml in any usual mailer lmil in frame, is or nrty he of any suitable or ap- I prim-n l consirm'liou \fllliiillllflg the WAY? for I the moving pans and hearings for ihc shafts :unl other opomting mechanism. 'lhiholi- (:11 rrying can" n B is also of a usual or my :ipprovod cons inc-lion, inonnioci upon snitnlaio ways on no oxi'onilml table A of ihe or appr priate nninuor.

ii hen iiio ports are in tlioposiiion shown in Fig. l the cuitvr-ilic is closed and in poilion lo ml the. Lhrvzuls uponlho boll l lilllk ll. living hell! :uul lULh'L il in this posiiion by mvzmS of a hitch (J The hull. rurriugc is then moved forvnml to a point horn tho Frame .ml wing-toil in be opei'iiiwi by moons of u lmlui wheel l5 mounted on the inai. i5". \i'hivh shaft is proviticd .i'iih :i

:uuwill strike the not a which nut is vi-(l on the roll C at the mint when: lhc lvngth of thread ilesiroil wil haw ilii'll When said arm strikes Hill l nut C it operates in tilt IllG lnlch C and ri-leusv its Pxbill iii?! its contact with the nut a will draw the rod A and, through its connection with the arm E, the cam-ring C into position to close the cutter-die, when the latch C will automatically engage over the latch-pin c and lock said cutter-die in position.

-- Thecutter-die C is mounted on a hollow s in: 1, journalcd in suitable bearings 2 on t e frame A. and is provided with a gear wheel 3, engaging with a pinion 4 on a driving shaft- 5, which is journaled in suitable bearings in uprights '3 and 7 on the end of fsaid frame. Said shaft 5 is provided with l a cone-pulley 8 by which it may be connected faith any convenient driving power.

i The follower D consists of a rod mounted to extend'through the hollow' spindle 1, being' formed on its inner enrlwith an enlarged pmtioix' d vhich is" adapted to fitto slide within the central" erfo'ration in the cutterhead. its outer en is supported in a ring ll secured at the end of said hollow spindle. Its forward end beyond the enlarged portion 1 is screw threaded andhardened and has a sli htly hollow or conical depression in'its en d. The thread on the part (i is of a pitch to correspond with the cutters of the cutter-die and being hardened will not be further out. by said cutter-idien'lts rear end is provided with a stop'collar d. and

fwith anothercollar 03 connected by means forced back. The

- B, its end, which is of a cord d passing over a pulley 71, which is mounted on a pintle a", with a weight-3V.

- Said wei ht W is'mounted to slideon a r05 5 D, whic rod is connected with the bracket D, which is secured to the outer end 'of spindle 1 so that said spindle will rotate freely therein, as most clearly shown in Fig. 4. By this arran ement the weight W will always has the follower D in the, position shown in ig. 1 with the stop collar (1 against the end of the bracket 1) and its forward end d in the-'cutter-di'e, unless it is arts bein in the position, hs shown in igs. 1 an 5. when the bolt'blank B is fed forward by the carriage usually rounded or somewhat tapered, will center in the depression (1 in the'poifit of'the part d of the follower. The"cuttei'-die being in rotation the operation will be to force said follower back and gradually take in the end of the bolt blank B. As said follower cannot move backany faster than the turning of the cuttcr-die will permit, the engagement of the cutter-die upon the "end of the bolt blank will be even and true under any condition,

regardless of the force or speed with which the carriage B is forced up to the die, the

result bein a true and even thread at the point as well as upon the other threaded portion of said bolt. \l'hcn the cuttin" operation upon the bolt is complcte, the die opened and the carriage moved back. as before described, the weight will operate to automatically move the follower forward in contact with the end bolt until the stop collar (I shall strike the outer face of the bracket D when the parts will be in the same position as shown in Fig.1. The cutter-die is closed, as before described, upon the hardened POIUOXI 6Z2 of said follower,

and the parts willbc in (position for another Hbolt and .carria 'e back. when the die is c opened) ready to receive a new blank avoiding the uecessitv of doing thisby hand.

Having thus fully described my said in vention,-what I claim as new and desire to secure b3 Letters Patent, is

1. In bolt cutting machine, the combination of the cutter-head formed with a central perforation and mounted upon a hollow spindlefthc carriage for feeding the bolt to the cutter-die. and a'followcr with a screwthreadd forward end mounted in said out ter-head with its screw-threaded end wit-bin sa'iddie and forming a rest for the end of the bolt while being operated upon. substantially as set forth. j

2. In a bolt cutting machine, the-combinamm of the cutter-head mounted upon a hollow spindle and carrying the cutter-die. the carriage for feeding the work to the ie. and a reciprocating follower mounted within said cutter-head and connected with a weight, whereby it is held into close contact with the end of the work being fed to the machine the forward end of said follower being screw-threaded and mounted within the cutting (lie, substantially as set forth.

3. 'In a bolt cutting machine, the combination of the cutter-head mounted upon a hollow spindle and formed with a central per- "foration, afollower mounted to reciprocate in said central perforation and connected with means for normally holding it forward, its extreme forward end being screwthreaded and mounted within the cutter-die to support and guide the work, and the work holding and feeding mechanism, substantially as set forth.

4. In a bolt cutting machine, the combination of the cutter-head formed with'a central perforation and mounted upon a hollow spindle, a follower mounted to reciprocate.

within said central perforation and formed with a stem extending through said hollow spindle, a stop for limiting the forward motion of said follower and a connection with a weight for holding said follower forward.

.ing screw-threaded and mounted within the cutter-die to bear against the work as it is fed to said die, the cutter-die, and means for holding and feeding said work, substantially as set forth.

5. In a bolt cutting machine, the combination of the cutter-head formed with a central l the extreme outer end of said follower beperforation and mounted upon a hollow spindle, a reciprocating follower mountedi therein, means for holding said follower forward, the extreme forward end of said foli lower being formed screw-threaded and of hardened material to lit and operate within 5 the die, means for holding and feeding the i work to said die, the point of said follower i being formed with an axial tapered hollow to receive and center the point of said work, substantially as set forth.

6. In a. bolt cutting machine, the eombina- 2 tion of the cuttenhead formed with a central l perforation and mounted upon a hollow l spindle, means for opening and closingthe l dies of said cutter-head operated through a l shifting lever or ring C said shifting lever 5 having an arm 6 provided with a latch-pin, l a latch pivoted upon the frame of the machine adapted to engage said latch-pin and l loci; said parts in position to hold the cutterl disclosed, the carriage for holding and feeding the work to said cutter-die having an 2 arm adapted to contact with a part connected 4 with said latch and release it at the point where the work is finished, and another 0011- "neetion between said carriage and said lover E connected with a sprint, which will operate l to draw said lever back and permit the die 4 to open, substantially as set forth.

7. In' a bolt cutting machine, the combination with the cutter-head and cutter-die 'lhereon, of a reciprocating follower mountconnected' with means to normally hold it forward with its extreme end within the cutter-die, means for opening and closing said l ed in a central perforation in said head and I l cutter-die, the work holding and feeding l.

carriage, and a connection between said work l holding and feeding carriage and the mechl anism for opening an-l closing said cutterdie whereby when the work has been finished said die opening mechanism will be automatically operated and the follower per mitted to return to its position within said die, substantially as set forth.

8. In a bolt cutting machine, the combination of the cutter-head, the reciprocating follower mounted therein and connected with means for normally holding it forward with its extreme forward end within the cutterdie, said cutter-die, the work holding and feedin; carriage adapted to feed the work against said follower and force it within the die, and a connection between the die opening and closing mechanism and said carriage whereby said (lie is automatically opened at the finish of the work, the follower returned to its position therein, and the die automatically closed thereon ready for the beginning of the next operation, suhstazr tially as set forth. a

'9. In a bolt cutting machine, the combination of the cutter-head, mea s for opening and closing the cutter-die, the work holding and feeding carriage, the operating lever for closing said cutter-die a latch pivoted on the frame of the machine for engaging with said lever and locking it in position .to hold said die closed, a trip-rod connected with said latch and provided with an adjustable nut adapted to contact. with an arm of said carriage to release said latch at the point where the work is finished, another rod also connected with said lever and with a spring adapted to draw said rod and lever back when said latch is released, to permit the die to open, and an adjustable nut-,on the opposite end of said rod with which said arm of said carriage will contact when it is drawn back to again close said die and per mit the latch to automatically engage with said lever to lock it in closed position, substantially as set forth.

In witness whereof. I have hereunto setmy hand and seal at \Vaynesboro, Pa., this 8th day of September, A. D. 1905.

ABRAHAM BLANDIS. 14's. 

